This technique is employed for the females with prolonged sterility. This is especially useful where the fimbriae fail to capture the ovum or the female having sperm antibodies in their cervical secretion. In GIFT, both sperm and unfertilized oocytes are transferred into fallopian tubes, after which fertilization takes place in vivo. The success rate of ZIFT is 27–30%. It involves the transfer of washed sperms and harvested ova to the ampulla of the fallopian tube with the help of a laparoscope. Fertilization and cleavage occur in the fallopian tube.